SE447360B - DEVICE FOR WELDING FOR TWO CIRCULAR FORMAL PLASTIC WAVES - Google Patents

DEVICE FOR WELDING FOR TWO CIRCULAR FORMAL PLASTIC WAVES

Info

Publication number
SE447360B
SE447360B SE8304838A SE8304838A SE447360B SE 447360 B SE447360 B SE 447360B SE 8304838 A SE8304838 A SE 8304838A SE 8304838 A SE8304838 A SE 8304838A SE 447360 B SE447360 B SE 447360B
Authority
SE
Sweden
Prior art keywords
welding
jaw
welding jaw
substrate
movement
Prior art date
Application number
SE8304838A
Other languages
Swedish (sv)
Other versions
SE8304838L (en
SE8304838D0 (en
Inventor
B L Andersson
Original Assignee
Meco Pak Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meco Pak Ab filed Critical Meco Pak Ab
Priority to SE8304838A priority Critical patent/SE447360B/en
Publication of SE8304838D0 publication Critical patent/SE8304838D0/en
Priority to EP84850258A priority patent/EP0139621A1/en
Priority to DK430484A priority patent/DK430484A/en
Publication of SE8304838L publication Critical patent/SE8304838L/en
Publication of SE447360B publication Critical patent/SE447360B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73715—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8222—Pinion or rack mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B29C66/82263—Follower pin or roller cooperating with a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B29C66/82265—Eccentric mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83541—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement
    • B29C66/83543—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement cooperating flying jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/026—Enclosing successive articles, or quantities of material between opposed webs the webs forming a curtain

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Basic Packing Technique (AREA)

Description

447 360 Fig. 1 är en perspektivvy av en anordning enligt uppfinningen. Fig. 1 is a perspective view of a device according to the invention.

Fig. 2 och 3 är schematiska sidovyer av anordníngen enligt fig. 1. « Fig. 4 är en perspektivvy av en hel krympfilmníngsmaskin.Figs. 2 and 3 are schematic side views of the device according to Fig. 1. Fig. 4 is a perspective view of an entire shrink film machine.

Anordningen enligt den visade utföringsformen innefattar ett fundament 11, som uppvisar ett väsentligen horisontellt däck 12, vilket tjänar som underlag för förpackningsenheterna 13.The device according to the embodiment shown comprises a foundation 11, which has a substantially horizontal deck 12, which serves as a base for the packaging units 13.

Fundamentet 11 innefattar vidare en på vardera sidan om däcket 12 anordnad vertikal ramdel 14, varav endast den ena är visad i figurerna. På vardera ramdelen är ett styrspår 15 anordnat för styrning av en första svetsback 16 mellan ett första läge beläget ovanför förpackningsenheten 13 och ett nära däcket beläget andra läge visat i fig. 1 och 3. Styrspåret 15 är utbildat av en slät skena 17 och en kuggstång 18 mellan vilka en kugghjulsförsedd tapp 19 är anordnad att löpa. Tappen 19 bildar en fast förbunden änddel av en axel 20, som löper igenom den första svetsbacken 16. Ingreppet mellan kuqghjulet 21 och kuggstången 18 på vardera ramdelen 14 medför att den första svetsbacken 16 hålles helt parallell, när den förs fram i spåret 15 med hjälp av en arbetscylinder 22. Styrspåret 15 har en första vertikal del 23 och en andra bågformig del 24, företrädesvis formad såsom en kvartscírkelbåge, så att svets- backens 16 rörelse i sitt nedre ändläqe blir väsentligen horisontell. I nämnda nedre ändläge är den första svetsbacken belägen omedelbart ovanför en öppning 25 i däcket 12. Genom denna öppning är en andra svetsback 26 rörlig från ett vilo- läge under däcket, visat i fig. 2, till ett svetsläge omedel- bart ovanför däcket, visat i fig. 3. Rörelsen sker krinq en axel 27 belägen under däcket med hjälp av en arbetscylínder 28 och en svängarm 29. Den andra svetsbacken 26, som är upp- värmd till lämplig temperatur för sammansmältning av två plastfoliebanor, har en vinkelformad anlíggningsyta FU, vars a spets 31 är styrd att infalla i ett längsgående spår 52 fyllt med silikbnmaterial i den första svetsbacken.The foundation 11 further comprises a vertical frame part 14 arranged on each side of the tire 12, of which only one is shown in the figures. On each frame part a guide groove 15 is arranged for guiding a first welding jaw 16 between a first position located above the packaging unit 13 and a second position located near the deck shown in Figs. 1 and 3. The guide groove 15 is formed by a smooth rail 17 and a rack 18 between which a geared pin 19 is arranged to run. The pin 19 forms a fixedly connected end part of a shaft 20, which runs through the first welding jaw 16. The engagement between the gear wheel 21 and the rack 18 on each frame part 14 means that the first welding jaw 16 is kept completely parallel, when it is advanced in the groove 15 by means of of a working cylinder 22. The guide groove 15 has a first vertical part 23 and a second arcuate part 24, preferably shaped as a quartz circular arc, so that the movement of the welding jaw 16 in its lower end position becomes substantially horizontal. In said lower end position, the first welding jaw is located immediately above an opening 25 in the tire 12. Through this opening a second welding jaw 26 is movable from a rest position below the tire, shown in Fig. 2, to a welding position immediately above the tire, shown in Fig. 3. The movement takes place around a shaft 27 located below the tire by means of a working cylinder 28 and a pivot arm 29. The second welding jaw 26, which is heated to a suitable temperature for fusing two plastic foil webs, has an angular abutment surface FU , the a tip 31 of which is guided to fall into a longitudinal groove 52 filled with silicone material in the first welding jaw.

En första plastfoliebana 40 och en andra plastfoliebana 41 avrullas successivt från en övre 42 resp. en nedre 45 förråde- 447 560 vals. Plastfoliebanorna styrs och hålls lämpligt strñckta med hjälp av styrrullar 44. I samma plan som däcket 12 är en inmatningsanordning 45 anordnad, vilken kan vara i form av en ändlös bandtransportör eller ett rullbord. Ett inskjut- ningsorgan 46 eller pusher är rörligt längs däcket 12 från viloläget, visat i figurerna, till ett ej visat utskjutet läge, i vilket framkanten 47 är belägen något (ca 20 mm) längre utänkuggstångens 18 vertikala del. Ett klämorgan 48 i form av en excentriskt lagrad vals är uppburet mellan de tvâ ramdelnrna 14 och är vertikalt inställbart genom att ramdelarna 14 försetts med ett anta] hål 49 mellan vilka valaens infästning:r GU kan förflyttas för anpassning till olika förpackníngsstorlnkar.A first plastic film web 40 and a second plastic film web 41 are successively unrolled from an upper 42 and 42, respectively. a lower 45 supply- 447 560 roller. The plastic foil webs are suitably guided and kept stretched by means of guide rollers 44. In the same plane as the deck 12 an feeding device 45 is arranged, which may be in the form of an endless belt conveyor or a roller table. A push-in member 46 or pusher is movable along the deck 12 from the rest position, shown in the figures, to a protruding position (not shown), in which the front edge 47 is located slightly (approx. 20 mm) further the vertical part of the outer rack 18. A clamping member 48 in the form of an eccentrically mounted roller is supported between the two frame parts 14 and is vertically adjustable in that the frame parts 14 are provided with a number of holes 49 between which the fastening of the roller GU can be moved to adapt to different package sizes.

I det följande skall anordningens funktion närmare beskrivas. föremålen eller varorna inmatas successivt på inmatningsanord- ningen 45 fram till ett läge framför inskjutningsorganet 46, som då lämpligt antal föremål samlats förskjuter dessa i däckets 12 längsriktníng, markerad med pilen 51 fram till sitt yttre åndläge. Under denna operation ör såväl den första som den andra svetsbacken tillbakadragna till sina vílolögen. Under inskjutningen kommer framsidan samt över- och undersidan på förpackningsenheten 13 att täckas med plastfolie. När enheten 13 skjuts in mot valsen 48, svänga denna upp och utövar ett tryck på ovansidan, vilket gör att inskjutnínqsorganet får ett lämpligt mothåll, så att enhetens 13 baksida blir exakt placerad i förhållande till svetsbackarna. Inskjutningsorganet 46 kan nu återgå till sitt utgångsläge, varefter den första svetsbacken 16 kan påbörja sin nedåtgående vertikala rörelse såsom visas i fig. 2. Härvid kommer den första plastfolie- banan 40 att löpa runt svetsbacken 16 och så småningom även täcka enhetens baksida. När svetsbacken 16 nått den andra bäg- formade delen 24 av styrspåret 15, börjar svetsbacken 16 att förskjuta förpackningsenheten 13 framåt, varvid foliehñljet kring enheten ytterligare spänna. När den första svetsbacken 16 nått slutläget, är den placerad omedelbart ovanför den andra svetsbacken 26, som nu kan föras upp genom öppningen 25 i däcket och klämma de två folíebanorna 40, 41 mellan sig och den första svetsbacken 16 såsom visas i fíg. 3. fftnr 447 360 svetsníngen fälls åter den varma svetsbacken 26 ned under däcket och den kalla svetsbacken 16 förs tillbaka till sitt utgångsläge ovanför enheternas 13 rörelsebana. Under backar- nas återgående rörelser håller valsen 48 den inslagna enheten i fixerat läge genom att valsen förutom sin tyngd även påver- kar enheten med en viss kilverkan. Detta är nödvändigt, eftersom plastfolien ofta klibbar fast vid den övre kalla svetsbacken 16. En ny uppsättning föremål 52 kan därefter föras in med inskjutningsorganet 46 mot de med svetsen samman- hållna foliebanorna 40, 41. När dessa föremål når baksidan på den föregående enheten blir de inriktade i linje efter denna samtidigt som den inslagna enheten förs framåt för att efter ytterligare en inslagningscykel nå värmeugnen 53. I denna utsätts enheterna för värmebehandling på sedvanligt sätt, så att foliebanderollen krymper till bildande av ett hårt åtdraget hölje kring enheten, vilket även åtminstone delvis kommer att täcka enhetens sidor.In the following, the function of the device will be described in more detail. the objects or goods are successively fed on the feeding device 45 to a position in front of the insertion member 46, which when the appropriate number of objects has been collected displaces them in the longitudinal direction of the tire 12, marked with the arrow 51 up to its outer breathing position. During this operation, both the first and the second welding jaws are retracted to their rest holes. During insertion, the front and top and bottom of the packaging unit 13 will be covered with plastic foil. When the unit 13 is pushed against the roller 48, it swings up and exerts a pressure on the upper side, which means that the insertion member has a suitable abutment, so that the rear side of the unit 13 is precisely positioned in relation to the welding jaws. The insertion member 46 can now return to its initial position, after which the first welding jaw 16 can begin its downward vertical movement as shown in Fig. 2. In this case, the first plastic foil web 40 will run around the welding jaw 16 and eventually also cover the back of the unit. When the welding jaw 16 reaches the second cup-shaped part 24 of the guide groove 15, the welding jaw 16 begins to displace the packaging unit 13 forward, whereby the foil cover around the unit further tightens. When the first welding jaw 16 has reached the final position, it is located immediately above the second welding jaw 26, which can now be raised through the opening 25 in the tire and clamp the two foil webs 40, 41 between them and the first welding jaw 16 as shown in fig. 3. fftnr 447 360 welding, the hot welding jaw 26 is lowered again below the tire and the cold welding jaw 16 is returned to its initial position above the path of movement of the units 13. During the return movements of the jaws, the roller 48 holds the wrapped unit in a fixed position in that the roller, in addition to its weight, also affects the unit with a certain wedge action. This is necessary because the plastic foil often sticks to the upper cold weld jaw 16. A new set of objects 52 can then be inserted with the insertion member 46 against the welded foil webs 40, 41. When these objects reach the back of the previous unit, they are aligned in line with it while the wrapped unit is advanced to reach the heating furnace 53 after another wrapping cycle. will partially cover the sides of the device.

Genom att den första svetsbacken 16 i inlednínqsskedot rör sig i en bana på tillräckligt avstånd från förpackninqsenheten 13 finns ingen risk för att denna skall skadas eller ändra läge under backens rörelse. När backen därefter förs framåt, kommer folíen att ytterligare spännas kring enheten genom friktionen mot underlaget. Friktionen förstärks genom inverkan av kläm- organet 48, som även medför att folíen kommer att löpa tätt runt den övre främre kanten, när enheten förs in mot folíen.Because the first welding jaw 16 in the initial stage moves in a path at a sufficient distance from the packaging unit 13, there is no risk of this being damaged or changing position during the movement of the jaw. As the jaw is then advanced, the foil will be further tightened around the unit by the friction against the ground. The friction is enhanced by the action of the clamping member 48, which also means that the foil will run tightly around the upper front edge, when the unit is inserted towards the foil.

Det bör noteras att några extra klaffar för enhetens fast- hållning inte är nödvändiga och inte heller är det nödvändigt att invänta svetsens avkylning, innan den folieomslagna enheten kan transporteras vidare. Genom att foliebanderollen redan efter svetsninqen noga följer förpackningsenhetens form, kan värmebehandlingen i den efterföljande ugnen inskränkas betyd- lit jämfört med tidigare kända krympfílmningsanordningar. 447 360 F19. 4 visar en hel krympfilmningsmaskin, som även innehåller den ovan beskrivna och i figurerna 1-3 återgivna anordningen.It should be noted that no extra flaps for holding the unit are necessary, nor is it necessary to wait for the weld to cool before the foil-wrapped unit can be transported further. Because the foil banner closely follows the shape of the packaging unit already after welding, the heat treatment in the subsequent oven can be significantly reduced compared with previously known shrink film devices. 447 360 F19. 4 shows a whole shrink film machine, which also contains the device described above and shown in Figures 1-3.

Maskinen innefattar på vanligt sätt en konventionell ugn 53, som är anordnad för värmebehandling av de inslagna enheterna.The machine usually comprises a conventional oven 53, which is arranged for heat treatment of the wrapped units.

Ugnen uppbärs av fundamentet 11 och ansluter till däcket 12.The furnace is supported by the foundation 11 and connects to the deck 12.

Av figuren framgår även placeringen av förrådsvalsarna 42, 43 i förhållande till däcket och beträffande valsen 42 hur folie- banan hålls lämpligt sträckt med styrrullarna 44. På den bortre vertikala ramdelen 14 visas kuggstången 18, vilken samverkar med kugghgulet 21 tillhörande den första arbetscylindern 22 för backens rörelse samt de för inmatning och gruppering avsedda transportbandet 45 och pushern 46.The figure also shows the position of the supply rollers 42, 43 in relation to the tire and with regard to the roller 42 how the foil web is kept suitably stretched with the guide rollers 44. The far vertical frame part 14 shows the rack 18, which cooperates with the gear wheel 21 belonging to the first working cylinder 22 the movement of the jaw and the conveyor belt 45 and pusher 46 intended for feeding and grouping.

Uppfinningen är givetvis inte begränsad till den visade ut- föríngsformen utan kan varieras på ett flertal sätt inom 'ramen för efterföljande patentkrav. , .....,,..,-.-,._-..-_.._..W_The invention is of course not limited to the embodiment shown but can be varied in a number of ways within the scope of the appended claims. , ..... ,, .., -.-, ._-..-_.._ .. W_

Claims (6)

447 360 Patentkrav 1447 360 Claim 1 1. Anordning för sammansvetsning av två kring ett eller flera föremål lagda plastfoliebanor (40, 41) avsedda att bilda ett värmekrympbart hölfie kring enheterna, innefattande ett underlag (12) för uppbärning av de till en enhet (13) gruppe- rade föremålen samt en första (16) och en andra (26) svets- back, varav åtminstone den första (16) är rörlig från ett övre ändläge ovanför underlaget (12) för att föra folíebanorna (40, 41) mot varandra och under klämverkan mot den andra backen (26) åstadkomma nämnda sammansvetsning, k ä n n e - t e c k h a d av att styrorgan (15) är anordnade för att leda nämnda första svetsback (16) mot nämnda andra svetsback i en bana avslutad av en del (24), som har en utsträckning längs med underlaget (12) så att nämnda första svetsback (16) under rörelsen i denna del (24) bringas till anliggning mot enheten (13).Device for welding together two plastic foil webs (40, 41) laid around one or more objects, intended to form a heat-shrinkable casing around the units, comprising a support (12) for supporting the objects grouped into a unit (13) and a first (16) and a second (26) welding jaw, of which at least the first (16) is movable from an upper end position above the base (12) to guide the foil webs (40, 41) towards each other and during clamping action against the second jaw (26) provide said welding, characterized in that guide means (15) are arranged to guide said first welding jaw (16) towards said second welding jaw in a path terminated by a part (24), which extends along the substrate (12) so that said first welding jaw (16) during the movement in this part (24) is brought into abutment against the unit (13). 2. Anordning enligt patentkravet 1, k ä n n e t e cuk n a d av att nämnda bana innefattar en första del (23) väsentligen vin- kelrät mot underlaget och en andra bågformig del (24).Device according to claim 1, characterized in that said web comprises a first part (23) substantially perpendicular to the substrate and a second arcuate part (24). 3. : Anordning enligt patentkravet 1 eller 2, k ä n n e t e c k - n a d av att nämnda andra svetsback (26) är rörlig mellan ett viloläge under underlaget (12) och ett svetsläge i samma plan som eller ovanför underlaget (12).3. A device according to claim 1 or 2, characterized in that said second welding jaw (26) is movable between a rest position below the substrate (12) and a welding position in the same plane as or above the substrate (12). 4. Anordning enligt något av föregående patentkrav, k ä n n e - t e c k n a d av att nämnda styrorgan (15) innefattar två styrspár, anordnade på vardera sidan av_föremàlens rörelse- bana längs underlaget (12), och att från nämnda första svets- back (16) utskjutande tappar (19) är styrda i nämnda spår mellan ett första läge, i vilket nämnda svetsback är belägen ovanför nämnda rörelsebana, och ett andra läge, i vilket nämnda svetsback är belägen i sitt svetslåge nära underlaget.Device according to any one of the preceding claims, characterized in that said guide means (15) comprises two guide grooves, arranged on each side of the path of movement of the objects along the substrate (12), and that from said first welding jaw (16) projecting pins (19) are guided in said groove between a first position, in which said welding jaw is located above said path of movement, and a second position, in which said welding jaw is located in its welding position near the substrate. 5. Anordning enligt patentkravet 4, k ä n n e t e c k n a d av att tapparna (19) bildar änddelar på en gemensam axel (20) ,__........._-....-.---v-:~- ' , 447 360 och uppvisar fast anbringade kugghjul (21). som är anordnade att löpa längs en kuggstång (18) 1 spåret.Device according to claim 4, characterized in that the pins (19) form end portions on a common shaft (20), __........._-....-.--- v-: ~ - ', 447 360 and has fixed gears (21). which are arranged to run along a rack (18) in the groove. 6. Anordning enligt något av föregående patentkrav, k ä n n e - t e c k n a d av att nämnda andra delflj24) av den första svetsbackens rörelsebana är formad såsom en kvartscirkel- båge.Device according to any one of the preceding claims, characterized in that said second part fl j24) of the path of movement of the first welding jaw is formed as a quarter circle arc.
SE8304838A 1983-09-09 1983-09-09 DEVICE FOR WELDING FOR TWO CIRCULAR FORMAL PLASTIC WAVES SE447360B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE8304838A SE447360B (en) 1983-09-09 1983-09-09 DEVICE FOR WELDING FOR TWO CIRCULAR FORMAL PLASTIC WAVES
EP84850258A EP0139621A1 (en) 1983-09-09 1984-09-06 Apparatus for welding together plastic-film webs
DK430484A DK430484A (en) 1983-09-09 1984-09-07 APPARATUS FOR COMPOSITION OF PLASTIC FILM COATS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8304838A SE447360B (en) 1983-09-09 1983-09-09 DEVICE FOR WELDING FOR TWO CIRCULAR FORMAL PLASTIC WAVES

Publications (3)

Publication Number Publication Date
SE8304838D0 SE8304838D0 (en) 1983-09-09
SE8304838L SE8304838L (en) 1985-03-10
SE447360B true SE447360B (en) 1986-11-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SE8304838A SE447360B (en) 1983-09-09 1983-09-09 DEVICE FOR WELDING FOR TWO CIRCULAR FORMAL PLASTIC WAVES

Country Status (3)

Country Link
EP (1) EP0139621A1 (en)
DK (1) DK430484A (en)
SE (1) SE447360B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8419859D0 (en) * 1984-08-03 1984-09-05 Engineering Developments Farnb Handles for packages
ES2173038B1 (en) * 2000-11-13 2003-11-01 Rochman S Coop PACKING MACHINE WITH A CLAMP REGULATION SYSTEM.
EP3254980B1 (en) * 2016-06-09 2018-12-19 Tetra Laval Holdings & Finance S.A. A packaging apparatus for forming sealed packages from a tube of packaging material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465489A (en) * 1965-06-30 1969-09-09 Weldotron Corp Method and apparatus for heat sealing and cutting film
US3564810A (en) * 1968-05-27 1971-02-23 Ollie B Wilson Jr Wrapping method and apparatus
NL155499B (en) * 1975-05-07 1978-01-16 Verwachting B V Maschf DEVICE FOR WRAPPING A STRETCHABLE FOIL FOR AN OBJECT TO BE WRAPPED.
DE2824753A1 (en) * 1978-06-06 1979-12-13 Willi Kopp Fa Parcel wrapping machine using welded sheet - has brake preventing sheet feed rollers turning when working together
US4319443A (en) * 1979-09-28 1982-03-16 Nordson Corporation Film wrapping machine

Also Published As

Publication number Publication date
SE8304838L (en) 1985-03-10
DK430484D0 (en) 1984-09-07
EP0139621A1 (en) 1985-05-02
DK430484A (en) 1985-03-10
SE8304838D0 (en) 1983-09-09

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